Grinding attachment for lathes.



F. M. SMITH. GRINDING ATTACHMENT FOR LATHES.

APPLICATION FILED Mme. 191s.

Patented NovQ23, 1915.

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' "F. M SMITH.

GRINDING ATTACHMENT FOR LATHES.

APPLICATION FILED MAR.B. 191s.

LWLWU, Patented Nov. 23, 1915,

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IN VE N TOR.

. lowing is a specification.

sierra arenas onion.

FRANK IVI. SMITH, OF KANSAS CITY, MISSOURI.

GRINDING ATTACHMENT FOR LATHES.

To all whomit may concern Be it known that l, FRANK M. SMITH, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented a certain new and useful Improvement in Grinding Attachments for Lathes, of which the fol- My invention relates to improvements in grinding attachments for lathes.

The object of my invention is to provide a strong, cheaply made, durable and efiicient grinding attachment which may be readily applied to lathes in common use.

A further object of my invention is to provide a novel grinding attachment for lathes which may be readily adjusted to positions in which it is adapted for respectively boring and grinding an engine cylinder.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawings, which illustrates the prefererd embodiment of my invention, Figure 1 is a side elevation of my improved grinding attachment shown mounted on a lathe, a portion of which is broken away. Fig. 2 is an end elevation of the attachment shown mounted on a lathe, the latter being partly broken away, and a portion of the pulley support being broken away. Fig. 3.is a top view, partly broken away, of the spacing means and swinging pulley support. Fig. 4 is an enlarged central longitudinal sectional view of the face plate, the bearing member, and some of the parts connected therewith, the view being on the line H of Fig. 2. Fig. 5 is an enlarged vertical sectional view on the line 5-5 of Fig.1. Fig. 6 is a vertical section on the line 6-6 of Fig. 5. Fig. 7 is an enlarged vertical sectional view of the link which is mounted on the stud of-the face plate. Fig. 8 is a view partly in side elevation and partly in vertical section of the face plate, bearing member, and rotary member showing the bearing member with its longitudinal center in alinement with the axis of the face plate, a cutting tool being shown mounted on the rotary member, the latter being shown locked to the bearing member. Fig. 9 is an end elevation of the cutting device shown in Fig. 8. Fig. 10 is a cross section on the line 10-10 of Fig. 1.

Similar reference characters designate similar parts in the difi'erent views. P

1 designates an ordlnary lathe body and Specification of Letters Patent.

Patented Nov. 23, 1215.

Application filed March 8, 1915. Serial No. 13,033.

2 the lathe spindle. 3 designates a flat face plate which is secured by bolts 1 to a threaded chuck 5 adapted to be fitted to the threaded forward end of the spindle 2. A bearing member provided with a cylindrical body 6 and a flat head 7 is eccentrically pivoted to the face plate 3 by a bolt 8 which extends through the head 7 and is secured to the face plate 3 eccentrically to the axis thereof. The bearing member 6 is adapted to be swung on the bolt 8 from the position shown in Fig. 8, in which the longitudinal center thereof is in alinement with the axis of the face plate 3 to the eccentric position shown in Figs. 1, 2, 1 and 5.

For adjusting the bearing member 6 to different positions, the head 7 thereof is provided with a screw-threaded hole in which is rotatably fitted an adjusting screw 9, Figs. 5 and 6, the inner end of the adjusting screw being rotatably mounted in a link comprishead 14: which is adapted to be rotatably provided in mounted in a transverse slot 15 the member 11.

' Rotatablyniounted on the bearin memher 6 is a member comprising, pre erably, a sleeve 16 which has rigidly secured in it an annular member 17, which is rotatably mounted on the member 6 and which is held from lengthwise movement in one direction thereon by a conical nut 18 which is mounted on the reduced screw-threaded outer end of the member 6, on which is also mounted a lock nut 19, Fig. 4, which is adapted to bear against the nut 18 to hold it in the position to which it may be adjusted. The-outer end of the rotary 'member or sleeve 16 is internally screw-threaded and is adapted to have fitted therein an abrading device, such be composed of an emery wheel 20 mounted on a bolt 21 which is secured to an externally.

screw-threaded chuck member 22 adapted to be fitted into the threaded outer end of the sleeve 16. Said sleeve 16 is also adapted to have mounted in it a cutting -or turning device 23, of'any suitable type and which is provided with a cutting tool 24, which may be radially adjusted by means of a screw 25 fitted in the body of the turning device 23.

=W'hen the cutting implement 23, shown in Figs. 8 and 9, is to be used, the bearing member 6 is adjusted to the concentric position shown in Fig. 8, at which time a transverse plate The turning device 23 may then be' employed to bore out an engine cylinder 29, Fig. 1, which may be mounted on a bracket 30, secured to the slide rest 31 of the lathe.

When it is desired to grind a cylinder, such as the cylinder 29, Fig. 1, the pin 28 is removed from the head 7, and the screw 9 turned so as to adjust the bearing member 6 to the, desired degree of eccentricity on thefaee plate 3. When it has been adjusted to the proper position, a nut 32 on the threaded outer end of the stud 12 is turned 7 so as to tightly clamp a washer 33, which is mounted on said stud, against the outer face of the head 7.

A set screw 34 mounted in a transverse screw-threaded hole in the sleeve 16, Fig. 8, is employed to lock said sleeve against rotation on the bearing member 6 when said bearing member is used in the concentric position shown in Fig. 8. When the bearing member is to be employed for polishing or grinding, the set screw 34 is loosened, or it maybe entirely removed from the sleeve 16 and a short screw 35, Fig. 4, substituted therefor.

For rotating the sleeve 16 on the bearing member 6, when the latter member is in the eccentric position shown in Figs. 1, 2, 4

and 5, the following described mechanism is preferably employed.

Rigidly'secured .to the inner end of the sleeve 16 is a pulley 36 which is adapted to be connected by a'belt 37 with a pulley 38, which is rotatably mounted on a pulley support comprising a horizontal shaft 39 mounted in a U-shaped member 40, Figs. 1, 2 and 3, which is secured between two vertical bars 41, the lower ends of which are pivoted to a transverse hori-' zontal bolt 42 mounted in a base plate 43 which is adapted to be" secured to the floor. Mounted on the shaft 39 and secured to the pulley 38 is a pulley 44 which is adapted to be driven by a substantially vertical belt 45, which in turn may be driven by any suitable means, not shown. The bolt 42 is disposed parallel with the spindle 2 of the lathe, so that the arms 41 and with them the pulley 38 may swing toward and from the axis of the face platefl3 while the pulley 36 and bearing member 6 are revolving in anorbit, the center of which is the axis of the face plate 3. Spacing means connecting the shaft 39 and the bearing member 6 are employed and consist, preferably, of a substantially horizontal bar 46 provided at one end with two arcuate arms 47, which embrace the bearing member 6 intermediate of the head 7 and pulley'36. The other end of the bar 46 is screw-threaded and extends through the transverse portion of a U-shaped member 48, the outer ends of the arms of which are each provided with recesses 49 adapted to receive therein the shaft 39. Clamping nuts 50 and 51, mounted on the rod 46 respectively embrace oppositesides of the transverse portion of the member 48.-

The spindle 2 may be driven by means of theausual cone pulley 52 mounted thereon and driven by the usual belt 53. When the spindle 2 is revolved, the bearing member 6 will revolve around the axis of the spindle 2, as will also the sleeve 16 which, with the emery wheel 20 carried thereby, will also rotate on its axis, while it is effecting its orbital movement, such rotation being effected through the intermediacy of the pulley 36, belt 37, pulleys 38 and 44, and belt 45.

I do not limit my invention to the structure shown and described, as modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention.

What I claim is 1. In a grinding attachment for lathes, a face plate adapted for attachment to a lathe spindle, a bearing member adjustable on said face plate to and from a position in which the longitudinal center of the bearing member will coincide with the axis of the face plate, a member rotatable on said bearing member and adapted to have secured to it an abrading device, and releasable means for holding said rotatable member from rotation on said bearing member.

2. In a grinding attachment for lathes, a face plate adapted for attachment to a lathe spindle, a bearing member pivoted eccentrically to the face plate, a stud secured to said face plate, a link pivoted to said stud, a screw connecting said link and said bearing member, and a member rotatable on said bearing member and adapted to have secured to it an abrading device.

3. In a grinding attachment for lathes, a face plate adapted for attachment to a lathe spindle, a bearing member pivoted eccentrically to the face plate, a stud secured to said face plate, means connecting the stud and said bearing member for swinging said bearing member to and from a position in -which the longitudinal center thereof will ing device, means for rotating said rotatable member, and releasable means for locking said rotatable member against rotation on said bearing member.

- 4. In a grinding attachment for lathes, a face plate adapted for attachment to a lathe spindle, a bearing member pivoted to said face plate, adjustable means for swinging said bearing member to and from aposition in which the longitudinal center thereof will coincide With the axis of the face plate, a member rotatable on said bearing member and adapted to have secured to it an abrading device, and releasable means for holding said rotatable member against rotation on said bearing member.

5. In a grinding attachment for lathes, a face plate adapted for attachment to a lathe spindle, a bearing member pivoted eccentrically to said face plate, adjustable means for swinging said bearing member to and from a position in which the longitudinal center thereof will coincide with the axis of the face plate, a member rotatable on said bearing member and adapted to have secured to it an abrading device, meansfor rotating said rotatable member on said bearing member, and releasable means for holding said rotatable member from such rotation.

In testimony whereof I have signed my name to this specification in presence of two subscribing witnesses.

FRANK M. SMITH. Witnesses:

WARREN D. HOUSE, E. B. Housn. 

